Raptorex skull

This image released by the American Association for the Advancement of Science (AAAS) shows the skull of Raptorex next to a full-size T. rex skull. The remains of Raptorex were found by fossil hunters in northern China, smuggled out of that country and offered for sale to collector Henry Kriegstein of Hingham, Mass., paleontologist Paul Sereno said. Kriegstein donated the fossil to science on the condition that the creature be named for his parents, Polish Jews who survived the Nazi death camps -- hence Raptorex kriegsteini.

This image released by the American Association for the Advancement of Science (AAAS) shows the skull of Raptorex next to a full-size T. rex skull. The remains of Raptorex were found by fossil hunters in northern China, smuggled out of that country and offered for sale to collector Henry Kriegstein of Hingham, Mass., paleontologist Paul Sereno said. Kriegstein donated the fossil to science on the condition that the creature be named for his parents, Polish Jews who survived the Nazi death camps -- hence Raptorex kriegsteini. (Paul Sereno/AAAS)

This image released by the American Association for the Advancement of Science (AAAS) shows the skull of Raptorex next to a full-size T. rex skull. The remains of Raptorex were found by fossil hunters in northern China, smuggled out of that country and offered for sale to collector Henry Kriegstein of Hingham, Mass., paleontologist Paul Sereno said. Kriegstein donated the fossil to science on the condition that the creature be named for his parents, Polish Jews who survived the Nazi death camps -- hence Raptorex kriegsteini.Paul Sereno/AAAS